There are only a couple of studies that have looked at the epidemiology of heading in these age groups, and thankfully, these studies have suggested that heading is not a very frequent activity for most children, especially in recreational leagues. (MomsTeam.com)
A couple of studies have shown that the parent's effort is one of the most important factors that affect the child's performance at the school. (babyishcare.com)
A couple of studies were done looking at the shoe size of women and the c - section rates. (verywellfamily.com)